Charles c



(No Model.)

C. C. PETERS.

APPARATUS FOR REGUTTING PILES. No. 434,884. Patented Aug. 19, 1890 )UNITED STATES PATENT OFFICE.

CHARLES C. PETERS, OF SPRlNGFIELD, OHIO, ASSIGNOR OF 'l`\V()-"`lllRDS TO JOHN V. B. HOYLE AND CHARLES 7: lVADSlVOR'lll, BOTH (ll1l SAli'l PLACE.

APPARATUS FOR RECUTTINGFH. ES.

SPECIFICATION forming part of Letters Patent No. 484,884, dated Augut 19, 1890.

t Application filed June 6, 1889. Serial 110.313,345. (No model.)

To al? wtom'izi may concern:

I 3e it known that l, CHARLES C. PETERS, a citizen of the United States, residing at `,Springrfield, in the county of Clark and Stato of Ohio,have invented certain new and useful Improvements in Apparatus torRccuttins;` Files, of which the following isa speci licatioli, reference being had therein to the accompanying drawings. i This invention relates to an improvement in apparatus for recutting tiles bythe cheniical action of certain electrolytes under the inliuence of an electric current.

Hcretofore many attempts-llave been made 'to recut Worn tiles bysubmergin thesanie in an acid solution or electrolyte rendered caustic by the iniuence of an electric current. These attempts have been only partially suceessful, for as the files were arranged in series with. and between cat-hodes-such as carbon plates-the resistance would be much greater at one end of 'the series than at the other end, and Where a chemical action was set up sutiiciently strong to affect those farthest removed from the point at which the current entered, those at the poiutof entrance would be destroyed by the too violent action ot' the electrolyte. Thus a chemical action that is sufficiently strong; to affect properly a series of tiles at one cud will destroythose at the opposite end-or, in other Words, 'Where the files are arranged between the cathodes and in series itis impossible for the resistance to be the same throughout the series. llence a uniformi chemical action cannothe obtained.

It is the object of the present invention to overcome these obstacles in a simple and ctfective manner, and to this end my invention consists in making the tiles to be cut formtheanodes by connecting all directly'with the positive pole of a battery or other source of electricity, and the carbon or other plates the cathodesby connecting all withtlie nega tive pole of avbattery, whereby the resistance and consequently the chemical action Will be the saine in any given number of files.

The invention consists, furthermore, in the novel arrangement and combination ot parts of such an apparatus, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming part of this specification, and in which like letters oi.l reference indicate corresponding` parts, Figure l is a perspective view ot iny improved apparatus, showi ng; one Way of su pporting the iiles and carbon plates in the electrolyte and their respective positions, and Fig. i is a top plan vieivof the saine showing more particularly the peculiar manner of arranging the tiles and carbon plates.

Referringto the drawings, A designates a rectangular tank for holding the electrolyte used in recutting` the files, the said tank bcing constructed of a suitable dielectric inaterial-such as lglass, porcelain, or wood.

B designates metallic rods, suitably sup ported at the top of the tank or Vessel and su pporting` the tiles O forming' the anodes, of which there may be any desired number. D designates similar rods, and E the cathodes supported thereby. The negative electrodes may be ot any desired or proper inateriai; but for obvious reasons carbon plates are preferred, as shown.

ln carrying,I the invention into practice, the tank is first iillcd with an electrolyte having normally a feeble and slow action upon iron or steel, but which will become rapid and caustic under the influence of an electric current. The particular elements of' this electrolyte may vary according to the necessities of` the case, and they may be composed of either acids or alkalies. Therefore I do not deem it necessary to state the component parts of the saine, but siinplyto mention the general characteristics and properties it possesses. The carbon plates forming the cathodes are suspended in the electrolyte, preferably in the manner shown-iliat is, in rows extending parallelto the side ot the tank-and are connected with the metallic supporting-rods by means of wires F, or in any other desired manner. The files forming the anodes are suspended in a similar manner. The ano'dcs and cathodes are connected with a suitable electrical source by means of wires, those designated by G leading" from the tiles and connecting with the positivo pole of the battery, and those designated by ll. leading from the the carbon plates and connecting with the vnegative pole of the battery. Then an elec tric current passes through the iiiesand from the tiles through the electrolyte to the carbon plates, a chemical action is set up, which renders the electrolyte caustic, and as thc-carbon plates are arranged at each sideot each of the illes it will necessarily follow thatboth sides of each ot the files will bc similarly atlccted. horeover, by the peculiar arrangement de scribed the resistance will be nixi't'orm throughout the entire numberotl files, thereby prevei'lting the destruction oi those nearest to the point et entrance. Moreover by the arrangement of Athe liles and. electrodes herein described l secure such an action as 'to aii'ect the tiles at the base and throughout theleng'th of their teeth equally, as distinguished from actin g merely upon the teeth immediately ad jacent to tl'leircutting-edge, which would have the elfect ultimately oi shortening the teeth and blunting them by making the longer of their sides too greatly obtuse.

Having thus fully described my invention, what l claim as new, and desire to secure by Letters Patent, ism

In an apparatus for recutting tiles by electro-chemical xaction, the combination, with a vessel and an electrolyte therein and metallic bars extending over the said vessel and forming` an electrical conductor, ot cathodes composed of carbon 'plates arranged in said Yessel in series and immersed in the electrolyte and electrically connected to said rods, a wire connecting said rods with the negative pole ot' asource of elcctricity,an l another rod extendin over said vessel and between the other rods, and a series of :files forming anodes connected to said rod and immersed in the electrolyte between 'the two series of cathodes, Wires connecting,` said rod with the positive 'polo of a source of electricity, the` Witnesses:

RANDOLPH CoLnnAN, liol-1N C. Bessere.; Jr. 

